Book Image

Hands-On RESTful Web Services with TypeScript 3

By : Biharck Muniz Araújo
5 (1)
Book Image

Hands-On RESTful Web Services with TypeScript 3

5 (1)
By: Biharck Muniz Araújo

Overview of this book

In the world of web development, leveraging data is the key to developing comprehensive applications, and RESTful APIs help you to achieve this systematically. This book will guide you in designing and developing web services with the power of TypeScript 3 and Node.js. You'll design REST APIs using best practices for request handling, validation, authentication, and authorization. You'll also understand how to enhance the capabilities of your APIs with ODMs, databases, models and views, as well as asynchronous callbacks. This book will guide you in securing your environment by testing your services and initiating test automation with different testing approaches. Furthermore, you'll get to grips with developing secure, testable, and more efficient code, and be able to scale and deploy TypeScript 3 and Node.js-powered RESTful APIs on cloud platforms such as the Google Cloud Platform. Finally, the book will help you explore microservices and give you an overview of what GraphQL can allow you to do. By the end of this book, you will be able to use RESTful web services to create your APIs for mobile and web apps and other platforms.
Table of Contents (20 chapters)
Free Chapter
Section 1: Unraveling API Design
Section 2: Developing RESTful Web Services
Section 3: Enhancing RESTful Web Services
Section 4: Extending the Capabilities of RESTful Web Services

TypeScript installation

We're finally at the TypeScript installation stage. Now that we have all of the dependencies installed, TypeScript installation is a piece of cake through npm:

$ npm install -g typescript

And that's it. TypeScript is ready to be used.

To create our first TypeScript application, create a folder called my-first-ts-app and in this folder, create a file called hello.ts with the following content:

function hello(person) {
return "Hello, " + person;

let user = "John User";

document.body.innerHTML = hello(user);

As you can see, it used a .ts extension for the hello.ts file, which means that this code is just JavaScript.

Now, it is time to compile the hello.ts file by running the following command at the command line:

$ tsc hello.ts

The result has to be a file called hello.js, which contains the same JavaScript that you filled in...